Method of manufacturing by forging or matricing circular pieces of work with a profiled periphery.



.T. GIRLOT. EETHOD 0F MANUFAGTURING BY FORGING 0R MATRIOING CIRCULARPIEOBS OF WORK WITH A PROFILED PEBIPHERY;

APPLICATION PILEDNOV. 22, 1910.

1,068,236. Patented July 22,1913.

2 HEHBTB-BEEET 1.

WITNESS ES INVEN TOR' 4 ATTORNEYS J. GIRLOT. METHOD OF MANUFACTURING BYFORGING 0R MATRIOING CIRCULAR PIECES OF WORK WITH A PEOFILED PERIPHERY.

APPLICATION FILED NOV. 22, 1910.

1,068,236, Patented July 22, 1913.

2 BHEETB'SEEET 2.

inarrni JOSEPH GTIRLGT, F LAEKEN, BRUSSELS, BELGIUM.

7 METHOD OF MANUFACTURING BY IEQRGING 01% BTATRICING CIRCULAR PIECES OFWORK WITH-A PROFILED JPIERIPHERY.

Specification of Letters Patent.

Patented ma as, i913.

Application filed November 253, 1910. Serial No. 593,687.

To all whom, it may concern:

Be 1t known that l, Josnrrr GIRLOT, a subject of the King of Belgium,and resi- .dent at Laeken, .Brussels, Belgium, manu- :t'acturer, haveinvented a new Method of Manufacturing by Forging or Matricing patent isdescribed a machine for matrix forging circular objects by means ofwhich their peripheries are operated on or worked upon by rollers whichhave a rotary motion.

This process in practice has shown that not only circular articles "maybe made having smooth or plain peripheries, but that those having shapedperipheries may also be produced when the rollers have the requiredshape.

The present invention relates to the manner or mode of producing thesearticles or objects such as gear wheels, grooved wheels, ribbed wheelsand the like.

The annexed drawings illustrate by way of example, a machine arrangedfor the manufacture of gear wheels by the application of the method offorging referred to.

Figure 1 is partly a front elevation and partly a sectional view; Fig. 2a plan; Fig. 3 an end View; and Fig. A: asection across the sleeves.

This machine is composed essentially of two-hammers 1, 1 actuated bypistons in the steam cylinders 2, .2, or by any other inotive power, insuch manner as to act simultaneously in opposite directions on the twofacesof the work. The regularity of.

motion of these two pistons is insured by the levers 3 and pivoted onthe fixed points 5. On the three rollers 6 are placed the sleeves 7,provided with teeth corresponding to those of the work to be produced.

To make a gear wheel, I employ a disk casting or ingot or a rolled barsuitably heated. This 'disk should be of a diameter corresponding to thedesired number of teeth and to the diameter of the finished piece, andthe thicknesses are regulated by practice according to the shape and thevarious thicknesses of the gear wheel to be produced. This disk isplaced between the rollers which have been previously separatedforthepurpose, they are then brought.

toward each other and given a rotary mo tion. They should be broughttoward each other up to the point that the gear teeth are rough shapedand at this point their approach should be stopped. The rotation of therollers 6 and theiradvance to and retreat from the blank are secured insub stantially the manner described in my Patent 983,012. Thus they aremounted in bearings 12 radially slidable in guide slots 13 in the fixedheads B. These bearings 12 engage also in the cam slots 1% of theadjusting disks l5 rotatably mounted on hubs on the heads 13. Rotationis imparted to these disks tl'iroughthe hand wheel 10, the pinions 16 ofwhich mesh with toothed seg ments 1'? on the periphery of each of thedisks 15. Obviously as thedisks l5 are reward or outward in the slots 13through the cam action of the slots let. The screw brake l1 acting onthe hand wheel 10 holds the rolls in the position to which they aremoved by the rotation of the hand wheel 10. In ad justed position therolls 6 are rotated on their individual axes through the shafts 18 whichmay be driven in the manner de scribed in the patent above mentioned.The adjustment of the rolls 6 is previously determined by means of agage which is introducedbetweeu the rollers, the outer diameter of thegage corresponding to that of the work to be produced This gage may be afinished piece. The continuation of the operation is effected by thehammers which in flattening the work so as to mold it, also enlarge itand force the teeth which have been roughly shaped by the rollers totake exactly the shape and size of those on the sleeves. The gear teethare thus formed with great solidity and hardness.

The mode of approaching'the rollers and fixing them may obviously bereplaced by any other suitable arrangement for the purpose. Ttisunderstood that the dimensions of the blank, in size and inthicknesswould be regulated in accordance with the method of operatingwhich is adopted in each case. The arrangement of the machine may bemodified according to the description or kind of work or articles to bemade.

, In order to determine with precision the exact spacing apart of theseveral roll sle ves T to secure the desired diameter For the finishedarticle and thus to properly position the automatic stop brake 11, thesimplest procedure is to mesh the sleeves with a model or sample pieceor article which is withdrawn when the sleeves have been exactlypositioned.

The employment of the sleeves for shaping the periphery of circulararticles has important advantages. They render it unnecessary to shapethe peripheries of the heavy and expensive rollers 6 to form workingfaces shaped to the periphery of the article subjected to their action.When it is de sired to change thecharacter of the'periphery on the blankall that is necessaryi-is to substitute another sleeve of the desiredform for the one then on the roller body, without having to replace theentire roller.

Obviously the expense of maintaining a variety of shapes is renderedvery muchless through the use of the sleeves, while therepair expense,due to wear, is confined substantially entirely to the sleeves Which canbe renewed at a cost far below that incident to replacing anentirero-ller. Further, the

' sleeves may be placed on the rollers in such manner as to enable themto be slid in the direction of the beat of the hammers as by vmountingthem on feathers 19 (Fig. .4).

This longitudinal displacement is very necessary when the work has to beshaped after the manner of a shaped or grooved rim for a tire and whenthe beat of the hammers cannot be controlled with mathematical accuracy.It might happen in this case that if a fixed shaping element be used,the work would be subjected to a shearing action at the base ofthegrooved edge, but if a movable shaping sleeve be used, the latterwill follow the work under any displacement and thus prevent anymalformation through in stability of center of the hammer blow.

I claim as my invention:

1. Av method of forging a circular object with shaped periphery whichconsists in rot ating a heated blank between peripherally.

shaping roll elements, the peripheries of which are shaped to impart thedesired form to the blank with which they are in contact andsimultaneously hammering the opposite faces of. the blank whereby thematerial thereof is pressed radially outward and takes the contour ofthe periphery of the shaping roll elements, substantially as de-"scribed.

and axially compressing the blank by hammer blows to force the materialthereof radially outward whereby the periphery of the blank is shaped tothe periphery of the shaping rolls, substantially as described.

4. A methodof forging a circular object with shaped periphery whichconsists in rough shaping the blank by rotating the same betweenperipherally arranged shaping rolls, the peripheries of which are shapedto impart the desired peripheral form to the blank with which they arein contact, said shaping rolls being gradually approached to each otherduring the rough shaping step, and then finishing the work by axiallycompressing the blank by hammer blows while the forming rolls aremaintained, spaced apart a constant-distance, whereby the material ofthe blank is forced radially outward against the forming rolls,substantially as and for the purpose described.

{5. A method of forging a circular object with shaped periphery whichconsists in rough shaping the blank by rotating the same betweenperipherally arranged longitudinally displaceable shaping roll elements,the peripheries of which are shaped to impart the desired peripheralform to the blank with which they are in contact, said shaping rollelements being gradually appreached to each other during the roughshaping step, and then finishing the work by axially compressing theblank by hammer blows while the shaping rolls are maintained spacedapart a constant distance, whereby the material of the blank is forcedradially outward against the shaping rolls, substan tially as and forthe purpose described.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses.

- JOSEPH GIRLOT. Witnesses:

GUSTAVE PIERRY,

, EMILE NUYTS.

